509391930 has 32 divisors (see below), whose sum is σ = 1224979200. Its totient is φ = 135566912.

The previous prime is 509391929. The next prime is 509391937. The reversal of 509391930 is 39193905.

It is not an unprimeable number, because it can be changed into a prime (509391937) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1410 + ... + 31949.

It is an arithmetic number, because the mean of its divisors is an integer number (38280600).

Almost surely, 2^509391930 is an apocalyptic number.

509391930 is an abundant number, since it is smaller than the sum of its proper divisors (715587270).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

509391930 is a wasteful number, since it uses less digits than its factorization.

509391930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33878.

The product of its (nonzero) digits is 32805, while the sum is 39.

The square root of 509391930 is about 22569.7126698591. The cubic root of 509391930 is about 798.6393171983.

The spelling of 509391930 in words is "five hundred nine million, three hundred ninety-one thousand, nine hundred thirty".